Air conditioner



FIG. 1 is an isometric view of a top, front, and left side of an ornamental design for an air conditioner;

FIG. 2 is a front elevational view of the air conditioner of FIG. 1;

FIG. 3 is a rear elevational view of the air conditioner of FIG. 1;

FIG. 4 is a left side elevational view of the air conditioner of FIG. 1;

FIG. 5 is a right side elevational view of the air conditioner of FIG. 1;

FIG. 6 is a top plan view of the air conditioner of FIG. 1; and,

FIG. 7 is a bottom plan view of the air conditioner of FIG. 1.

The broken lines are included for the purpose of illustrating portions of the air conditioner that form no part of the claimed design. 

CLAIM The ornamental design for an air conditioner, as shown and described. 